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Math 12 Chapter 4
Introduction to Analytic Geometry
Test - 8
1.
If the matrix * * * is singular then the lines are concurrent
a) True
b) False
2.
Three lines a1x+b1y+c = 0, a2x+b2y+c2 = 0 and a3x+b3y+c3 = 0 are concurrent if
a) False
b) True
3.
Area of trapezoidal region = 1/2(sum of // sides) (distance between // sides)
a) True
b) True
4.
If a line intersects x-axis at (a,0) then a is called y-intercept of the line.
a) False
b) True
5.
If a > 0 in the equation of y = a then the line l is below x-axis
a) False
b) True
6.
The centroid of a Δ ABC is a point which divides each median in the ratio 2:1
a) True
b) True
7.
If a line l intersects y-axis at (0,b) then �b� is called x-intercept of the line
a) True
b) False
8.
Equation of a straight line with slope m and y-intercept c is y = mx + c.
a) False
b) True
9.
The distance d from a point (x
1
,y
1
) to the line l:ax+by+c=0 is d =√(x
2
-x
1
)
2
+(y
2
-y
1
)
2
a) True
b) False
10.
x-x
1
/cosα = y - y
1
/sin α = r is symmetric form of equation of a straight line.
a) True
b) True
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